Systems and processes for pyrolyzing waste plastics, including, in one or more heating stages, heating a waste plastic from an initial temperature to a peak pyrolysis temperature, and, in a final pyrolysis stage, providing heat input sufficient to maintain a temperature of the waste plastic at a pyrolysis reaction temperature less than the peak pyrolysis temperature and maintaining the waste plastic at the pyrolysis reaction temperature for a time period to convert a portion of the waste plastic to a pyrolyzed product and a pitch. The process further includes recovering the pyrolyzed product and recovering the pitch.

Systems and processes for pyrolyzing waste plastics, including, in one or more heating stages, heating a waste plastic from an initial temperature to a peak pyrolysis temperature, and, in a final pyrolysis stage, providing heat input sufficient to maintain a temperature of the waste plastic at a pyrolysis reaction temperature less than the peak pyrolysis temperature and maintaining the waste plastic at the pyrolysis reaction temperature for a time period to convert a portion of the waste plastic to a pyrolyzed product and a pitch. The process further includes recovering the pyrolyzed product and recovering the pitch.

A molten thermoplastic circulation system that is used in conjunction with thermoplastic melter kettles. The molten circulation system includes a vertical material transfer tube that is coupled to a melter kettle and includes an auger. The vertical material transfer tube is coupled to the top and bottom of a melter kettle so as to transfer molten thermoplastic between the bottom and top of the melter kettle. The vertical material transfer tube is at least partially surrounded by a heat chamber through which a heated fluid such as hot combustion gases or heated oil can flow. In use molten thermoplastic material that is heated at a higher temperature at the bottom of a melter kettle near the combustion chamber is transferred through the vertical material transfer tube to the top of the melter kettle to improve melting efficiency.

Sulfur copolymerization includes combining elemental sulfur with modified bitumen to yield a mixture, blending the mixture, and curing the mixture to yield a copolymerized modified bitumen. The modified bitumen includes waste vegetable oil. Inverse vulcanization includes combining an unsaturated fatty acid and an alkaline earth metal (hydr)oxide to yield a mixture, combining elemental sulfur with the mixture, and processing the mixture to yield a sulfur copolymer.

Sulfur copolymerization includes combining elemental sulfur with modified bitumen to yield a mixture, blending the mixture, and curing the mixture to yield a copolymerized modified bitumen. The modified bitumen includes waste vegetable oil. Inverse vulcanization includes combining an unsaturated fatty acid and an alkaline earth metal (hydr)oxide to yield a mixture, combining elemental sulfur with the mixture, and processing the mixture to yield a sulfur copolymer.

A method and system for generating a tire rubber asphalt compound is described. The method includes receiving an asphalt compound and heating the asphalt compound to approximately 320° F. to 420° F. The method then proceeds to add tire rubber to the asphalt compound. The asphalt compound and the scrap tire rubber are mixed for approximately 5 minutes to 360 minutes during heating to approximately 525° F. to 700° F. to generate the tire rubber asphalt compound. The tire rubber asphalt compound is then cooled.

Granules of material usable as a road binder or as a sealing binder including a core and a coating layer, wherein: the core consists of a first composition including at least one material selected from: a bitumen base, a pitch, a clear binder, and the coating layer consists of a second composition which includes: at least one viscosifying compound selected from cellulose ethers, and at least one anticaking agent. Also, a method for producing granules of material that can be used as a road binder or as a sealing binder, and the use thereof as a road binder, in particular for the production of coated materials. Also, a method for producing coatings from granules of material that can be used as a road binder or as a sealing binder and to a method for transporting and/or storing and/or handling granules.

Granules of material usable as a road binder or as a sealing binder including a core and a coating layer, wherein: the core consists of a first composition including at least one material selected from: a bitumen base, a pitch, a clear binder, and the coating layer consists of a second composition which includes: at least one viscosifying compound selected from cellulose ethers, and at least one anticaking agent. Also, a method for producing granules of material that can be used as a road binder or as a sealing binder, and the use thereof as a road binder, in particular for the production of coated materials. Also, a method for producing coatings from granules of material that can be used as a road binder or as a sealing binder and to a method for transporting and/or storing and/or handling granules.

A method and system for generating a tire rubber asphalt compound is described. The method includes receiving an asphalt compound and heating the asphalt compound to approximately 320° F. to 420° F. The method then proceeds to add tire rubber to the asphalt compound. The asphalt compound and the scrap tire rubber are mixed for approximately 5 minutes to 360 minutes during heating to approximately 525° F. to 700° F. to generate the tire rubber asphalt compound. The tire rubber asphalt compound is then cooled.

A method for preparing a paving material includes heating an aggregate comprising recycled asphalt pavement using an emitter generating electromagnetic radiation having a wavelength of from 2 microns to 1 millimeter. The method utilizes solid phase autoregenerative cohesion to prepare a material suitable for use as an aggregate in a hot mix asphalt pavement installation.